NCIDQ IDFX Practice Exam

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What does a prescriptive (closed) specification imply in construction?

Open competition among multiple manufacturers is encouraged
Specific manufacturer products are required without substitutions
General guidelines are provided without brand mention
Standard performance criteria must be met

The correct answer is: Specific manufacturer products are required without substitutions

A prescriptive (closed) specification implies that specific manufacturer products are required, and substitutions are not allowed. This type of specification provides detailed requirements for materials and products that dictate exactly what is to be used in the construction process. It ensures consistency, quality, and compatibility within the project by clearly identifying the products that must be utilized. In this context, the use of a closed specification can minimize risk by ensuring that the exact materials approved by the designer or architect are the ones used, which can simplify the construction process and help prevent potential issues with performance or aesthetics associated with different products. This specificity aids in maintaining design intent and meeting the project’s requirements as closely as possible, thereby ensuring optimal results.